act your age 中文意思：表现成熟些，稳重一点，不要孩子气。

【例句】
Act your age, don't act like a child.
稳重一点，别表现得像个小孩一样。

His father told his 15-year-old son ,“Act you age！”
他老爸对他十五岁的儿子说：“表现成熟点”。